![Kiel diagram for 290 stars with 5000 K ≤ Teff ≤ 6500 K and log g ≥ 4.0 dex analyzed in this work. The dashed black lines present the solar values obtained for the Ceres 2009-02-08 solar spectrum, Teff = 5759±18 K, log g = 4.43±0.05 dex and [Fe/H] = 0.00±0.01 dex. -- astro-ph.EP](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/07/Chemical-Abundances.png?resize=1200%2C720&ssl=1)
[astro-ph.EP] We determined atmospheric and evolutionary parameters, along with chemical abundances of C, O, S, Fe, and Ni for 290 solar-type exoplanet hosting stars using high-resolution HARPS-North and HARPS-South spectra, […]
Biochemistry & Organic Chemistry
Posted inMars
The Impact of the Viking Entry, Descent, and Landing Legacy on Future Mars Exploration
[Astrobiology] This article outlines engineering challenges that were involved in the design innovations required to successfully deliver not one but two landers for Viking.
Posted inAstrochemistry
Charge Transfer From Ammonia Neutralizes Propylene Oxide Cations: Implications For The Astrochemistry Of Chiral Molecules
[astro-ph.GA] To date only one chiral species, propylene oxide, has been observed in the interstellar medium but little is known about the chemistry that leads to a detectable abundance of […]
Posted inMars
Curiosity Rover Takes a Close Look at Martian Sulfur Crystals
[NASA] These sulfur crystals were found inside a rock after NASA’s Curiosity Mars rover happened to drive over it and crush it on May 30, 2024, the 4,200th Martian day, […]
Posted inBiochemistry & Organic Chemistry
Unraveling The Building Blocks Of Earth’s Pigments
[Ohio State] Although they are some of the most widespread substances on Earth, not much is known about eumelanin, or natural organic matter (NOM) — a dark-colored substance formed by […]
Posted inAstrochemistry
Theoretical and Experimental IR Spectra of Astronomical PAHs and PANHs in the 2000–1650 cm–1 Range (∼5–6 μm)
[ACS Earth and Space Chemistry] Recent James Webb Space Telescope observations reveal unprecedented details in the 2000–1650 cm–1 (∼5–6 μm) region, including the well-known 5.25 and 5.75 μm bands.
Posted inNanotechnology & SynBio
Ecological Constraints To Mirror Life
[bioRxiv] Our biosphere exhibits remarkable diversity yet is constrained by universal organizational principles, including molecular homochirality.
Posted inAstrochemistry
Theoretical Determination Of The Binding Energies Of Methanol And Related Species Onto Amorphous Solid Water Ice
[astro-ph.GA] The formation and survival of complex organic molecules (COMs) in cold interstellar environments depends on their interactions with icy dust grain surfaces.
Posted inAstrochemistry
Probing Outflow Physics Through CH3CN And CH3OH Chemistry
[astro-ph.GA] Chemical correlations between molecules provide powerful diagnostics to probe the physical conditions of protostellar outflows. In particular, the relationship between methanol (CH3OH) and methyl cyanide (CH3CN) offers a promising […]
Posted inUncategorized
Bioleaching Of Critical Trace Metals By Sphingomonas Desiccabilis: Substrate-driven Selectivity In Earth And Space Analogues
Background – Biotechnological advances are transforming the potential for sustainable resource utilization in space exploration. Biomining, using microorganisms to extract valuable metals, has emerged as a viable strategy for in […]